It's a partnership so perfect, you might wonder why it hasn't already happened: British style icon Sienna Miller is now the face of Burberry.

But the 31-year-old actress isn't going it alone. She'll pose in Burberry's classic trench coat along with her fiance, fellow English actor Tom Sturridge, in the ads, which were shot by Mario Testino and officially debut this fall.

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Miller has a long history of choosing Burberry on the red carpet—she's donned creative director Christopher Bailey's creations twice at the Costume Institute Gala (once in a gold mini-dress and this past May in a white silk dress and studded bomber jacket), and worn Burberry to Sturridge's opening night performance of the Broadway play Orphans. (The duo were both in Burberry during this year's Tony Awards, where Sturridge was nominated for Best Featured Actor in a Play.)

This isn't Miller and Sturridge's first stylish collaboration. Eleven months ago, the couple had a baby girl named Marlowe—which works out well, considering Burberry makes itty bitty trench coats for toddlers in their children's line. Perhaps she'll follow in Romeo Beckham's footsteps and book a Burberry gig of her own!